A person may throw up blood after drinking for different reasons, depending on factors such as how much they drink and their other lifestyle choices. The main risks associated with drinking and throwing up blood are damage to the liver and alcohol-related liver disease, which are prevalent among regular drinkers. A 2018 study notes that alcohol-related liver disease is one of the main causes of chronic liver disease worldwide. Additionally, alcohol is a risk factor in people who have other forms of liver disease, such as that resulting from the hepatitis C virus. It may not always be possible to avoid throwing up blood after drinking, but abstaining from alcohol will be an effective preventive measure for many people. Drinking alcohol over time increases the risk of liver damage and its related issues, which may increase the risk of vomiting blood. It may also help to remove other risk factors for bleeding, such as regular non-steroidal anti-inflammatory drug (NSAID) use. Drinking water and staying hydrated may eliminate dehydration, which could prevent throwing up blood due to the irritation of a dry throat.